How do we recharge the study lights?

The lights can be charged through the supplied 1.0 Watt solar panel. The Study Lights can also be charged from the mains using any of the popular mobile chargers (thick or thin-pin type). Ideally the time required to charge through the mains is 2-1/2 hours whereas it takes about 6 - 8 hours on a sunny day to fully charge the light using the solar charger. Solar bulk chargers are available for schools, where at a time 20 to 50  students can charge their lights.